A gene that produces a protein that is important in more than one biochemical pathway, or other trait, is a ___ gene. Select one:
a. pleiotropic
b. recessive
c. codominant
d. incomplete dominant
e. dominant
a. pleiotropic
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Which of the following pairs of names is NOT a match?
A. Piciformes/woodpeckers B. Falconiformes/eagles, hawks, vultures C. Passeriformes/robins, starlings, sparrows/warblers, etc. D. Anseriformes/ducks, geese/swans E. Galliformes/owls
The application of __________ substitutes for low temperature or light requirements for biennial
germination. a. indoleacetic acid b. indolebutyric acid c. naphthaleneacetic acid d. gibberellins e. ethephon
Why is the velocity of blood flow lowest in capillaries?
a. Capillaries are far from the heart, and blood flow starts to slow as it moves away from the heart. b. The systemic capillaries are supplied by the left ventricle, which has a lower cardiac output than the right ventricle. c. The total surface area of capillaries is larger than the total surface area of the arterioles. d. The capillary walls are not thin enough to allow oxygen to exchange with the cells. e. The diastolic blood pressure is too low to deliver blood to capillaries at a high flow rate.
Which of the following is NOT an example of how tumors evolve?
A) Tumor cells can spread throughout the body. B) Tumor cells show genetic variability. C) Tumor cells grow uncontrollably. D) Tumor cells pass on mutations when they divide.